The Transition Networks 1 Channel CWDM Equipment uses a passive technology that allows for any protocol to be transported over the fiber link, as long as it is at a specific wavelength. This CWDM with Mux/Demux and Add/Drop Mux can provide a simple and affordable method to maximize existing fiber capacity. It provides scalable bandwidth of up to 10 Gb/s per channel over existing fiber links and a wavelength of 1490 nm. This multiplexing equipment transmits multiple protocols over an existing duplex fiber link by combining the fiber outputs of multiple media converters.